Subtract 20/28 from 84/21
1st number: 4 0/21, 2nd number: 20/28
84/21 - 20/28 is 23/7.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 28 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 21 × 4 = 84,
84/21 = 84 × 4/21 × 4 = 336/84 - Likewise, for the 2nd fraction, since 28 × 3 = 84,
20/28 = 20 × 3/28 × 3 = 60/84 - Subtract the two like fractions:
336/84 - 60/84 = 336 - 60/84 = 276/84 - After reducing the fraction, the answer is 23/7
- In mixed form: 32/7
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